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<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=1193469
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<head>
  <title>Test for Bug 1193469 Settings API</title>
  <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
  <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
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<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1193469">Mozilla Bug 1193469</a>
<p id="display"></p>
<div id="content" style="display: none">
<iframe></iframe>
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<pre id="test">
<script class="testbody" type="text/javascript;version=1.7">

var url = SimpleTest.getTestFileURL("file_loadserver.js");
var script = SpecialPowers.loadChromeScript(url);

SimpleTest.waitForExplicitFinish();

SpecialPowers.pushPrefEnv({
  set: [["dom.mozSettings.enabled", true]]
},
  function () {
    ok(true, "abusing observers");

    var obs;
    for (obs = 0; obs < 9; obs++) {
      navigator.mozSettings.addObserver("fake.setting.key", function(v) {
        // nothing to do for real ...
        ok(false, "should not be called");
      });
      ok(true, "first: added observer #" + obs);
    }
    ok(true, "adding first observers, should not have thrown");

    try {
      ok(true, "second: adding new observer");
      navigator.mozSettings.addObserver("fake.setting.key", function(v) {
        // nothing to do for real ...
        ok(false, "should not be called");
      });
      ok(false, "adding too many observers should have thrown");
    } catch (ex) {
      ok(true, "got exception when trying to add too many observers");
    }

    SimpleTest.finish();
  });

</script>
</pre>
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